I just got an invite to this event on facebook. This kid is 7 years old and was diagnosed with acute lymphoblast leukemia when he was five. His birthday is May 30th and his wish is to receive birthday cards. He's trying to beat the world record of 350 million cards received, and I thought it was kinda cool. You have to send store-bought birthday cards. They said home made cards are welcome, but don't count towards the total (I have no idea why).
Anyway, this struck me as something that some people here would find kinda cool. This is the adress:
PO Box 484
From the United States it takes two postage stamps.